gregsurname

This WPMU plugin sets up a template system for new blogs. When a new blog is created it can have a template applied to it. These templates allow for these blog options to be set:
<ul>
<li>Blog options.(Privacy, Theme, Moderation, etc)</li>
<li>Extra posts to be created.</li>
<li>Extra pages to be created.</li>
<li>Extra links to be created.</li>
<li>Extra page categories to be created.</li>
</ul>
A default template can be created if all you are after is a single set of new blog defaults.

Blog Templates

A WPMU plugin that sets up a template system that lets you have a template appied to new blogs.

Emanuela Castorina

This plugin in a multisite installation shows the ID of the current site/blog in the admin bar menu. The ID of the current site/blog is linked to the site info page. 
It adds also a custom column with site id information inside the sites list table. 
It can be installed only on a multisite.

Wp Show Site ID

This plugin in a multisite installation shows the ID of the current site/blog.

Blog Templates vs Wp Show Site ID